#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(ri,n) for(int ri = (int)(n-1); ri >= 0; ri--)
#define rep2(i,x,n) for(int i = (int)(x); i < (int)(n); i++)
#define rrep2(ri,x,n) for(int ri = (int)(n-1); ri >= (int)(x); ri--)
#define repit(itr,x) for(auto itr = x.begin(); itr != x.end(); itr++)
#define rrepit(ritr,x) for(auto ritr = x.rbegin(); ritr != x.rend(); ritr++)
#define ALL(x) x.begin(), x.end()
using ll = long long;
using namespace std;

int main() {
  string s;
  cin >> s;
  ll base = 1, now = 0;
  bool f = false;
  rep(i, s.size()) {
    if(s.at(i) == '.'){
      f = true;
      continue;
    }
    now *= 10;
    now += s.at(i) - '0';
    if(f == true) {
      base *= 10;
    }
  }
  if(now == 0) {
    cout << "0/1" << endl;
    return 0;
  }
  ll g = gcd(now, base);
  cout << now/g << "/" << base/g << endl;
  return 0;
}